One thing to bear in mind is that CN will tend to take precedence over all your other maps unless you disable it.

Came across a very similar issue just this morning and figured if I searched enough I'd find an answer. But seeing as you all brought it up . . . CN loaded into internal memory. 100k Topo loaded onto SD card. Route developed in BC and sent over - all works fine but only if SD card is left out. Once I drop the card in, Montana tells me route doesn't match map. Check of map settings only shows Topo installed and enabled (along with factory loaded maps) and CN seems to have disappeared. Shut down, remove card, and CN shows back up as enabled. I'm doing something wrong, right?

Came across a very similar issue just this morning and figured if I searched enough I'd find an answer. But seeing as you all brought it up . . . CN loaded into internal memory. 100k Topo loaded onto SD card. Route developed in BC and sent over - all works fine but only if SD card is left out. Once I drop the card in, Montana tells me route doesn't match map. Check of map settings only shows Topo installed and enabled (along with factory loaded maps) and CN seems to have disappeared. Shut down, remove card, and CN shows back up as enabled. I'm doing something wrong, right?

Came across a very similar issue just this morning and figured if I searched enough I'd find an answer. But seeing as you all brought it up . . . CN loaded into internal memory. 100k Topo loaded onto SD card. Route developed in BC and sent over - all works fine but only if SD card is left out. Once I drop the card in, Montana tells me route doesn't match map. Check of map settings only shows Topo installed and enabled (along with factory loaded maps) and CN seems to have disappeared. Shut down, remove card, and CN shows back up as enabled. I'm doing something wrong, right?

Sounds like a job for JaVaWa Device Manager. Download it, connect the gps and run JDM, and it'll likely tell you what's wrong and how to fix it.

__________________Want to know more about the Garmin Montana? See the Wisdom and FAQ Thread.Want to know more about the Garmin VIRB? See here.
"The motorcycle, being poorly designed for both flight and marine operation, sustained significant external and internal damage," police noted.

I don't think the via points are via points in an A to B route. Like I said I routed 4100 miles to Alaska from Pennsylvania. It sounds like you are saying that each turn point is a via. It's not since the unit made the route. If I add a via point in basecamp it's announced as a via point on the turn by turn directions. There are well over 100 turns in the route I made (that the unit routed) and there is no issue with routing that way.

I don't think the via points are via points in an A to B route. Like I said I routed 4100 miles to Alaska from Pennsylvania. It sounds like you are saying that each turn point is a via. It's not since the unit made the route. If I add a via point in basecamp it's announced as a via point on the turn by turn directions. There are well over 100 turns in the route I made (that the unit routed) and there is no issue with routing that way.

I think you're right - via points are things you've added to force a route to go a certain way. If the gps creates the route, the locations it selects for turns, etc, are not via points.

__________________Want to know more about the Garmin Montana? See the Wisdom and FAQ Thread.Want to know more about the Garmin VIRB? See here.
"The motorcycle, being poorly designed for both flight and marine operation, sustained significant external and internal damage," police noted.

Only 8 posts left to make then I'll have posted more than DRTBYK! I'm in the final stretch, unless he comes back soon.

__________________Want to know more about the Garmin Montana? See the Wisdom and FAQ Thread.Want to know more about the Garmin VIRB? See here.
"The motorcycle, being poorly designed for both flight and marine operation, sustained significant external and internal damage," police noted.

Like I said, never found any two units routed the same. Any code geeks have any idea why? Not that it'll make any diff, my own curiosity more than anything.

I think we need to take this up with Garmin Cartography. Here's a series of screen shots I made tonight, while simulating a route through the 417 to Alexandria. As seen in the shots, it clearly looks like you're to get off at the Metcalfe street exit. Even the lane indicator says so.

__________________Want to know more about the Garmin Montana? See the Wisdom and FAQ Thread.Want to know more about the Garmin VIRB? See here.
"The motorcycle, being poorly designed for both flight and marine operation, sustained significant external and internal damage," police noted.

Montana Fail. Went to use it for the first time going to baja. After about 30 minutes of working fine, the screen goes crazy. Side ways, upside down, right side up, then it shuts off. Happend every hour andore frequent as the days went by. I know the connection is good because the Montana powers up and down as the bike does. Garmin tech support never even heard of this. Sent it back today and they're going to send me another one. Irritating because we wen to baja and it was needed.

Montana Fail. Went to use it for the first time going to baja. After about 30 minutes of working fine, the screen goes crazy. Side ways, upside down, right side up, then it shuts off. Happend every hour andore frequent as the days went by. I know the connection is good because the Montana powers up and down as the bike does. Garmin tech support never even heard of this. Sent it back today and they're going to send me another one. Irritating because we wen to baja and it was needed.

Sounds like two common issues: you need to lock the screen orientation through Setup/Display/Orientation, and you need an earplug in the battery case to stop the shutdowns.

__________________Want to know more about the Garmin Montana? See the Wisdom and FAQ Thread.Want to know more about the Garmin VIRB? See here.
"The motorcycle, being poorly designed for both flight and marine operation, sustained significant external and internal damage," police noted.

Like I said, never found any two units routed the same. Any code geeks have any idea why? Not that it'll make any diff, my own curiosity more than anything.

We were playing with 5 different Garmins one day. Had them all set with the same version of CN and the same avoidance's. Had them route from Dallas to Clarksville AR. Got 5 different routes. One of them actually came up with a 700 mile route. The most accurate one was the el cheapo Nuvi 265, the route was a little over 300 miles.